Acid Rain Program means a multi-state SO₂ and NO_X air pollution control and emission reduction program established by the Administrator under title IV of the Clean Air Act and parts 72 through 78 of this chapter.

Administrator means the Administrator of the United States Environmental Protection Agency or the Director of the Clean Air Markets Division (or its successor determined by the Administrator) of the United States Environmental Protection Agency, the Administrator's duly authorized representative under this subpart.

Allocate or allocation means, with regard to CSAPR SO₂ Group 2 allowances, the determination by the Administrator, State, or permitting authority, in accordance with this subpart and any SIP revision submitted by the State and approved by the Administrator under § 52.39(g), (h), or (i) of this chapter, of the amount of such CSAPR SO₂ Group 2 allowances to be initially credited, at no cost to the recipient, to:

Allowance Management System means the system by which the Administrator records allocations, auctions, transfers, and deductions of CSAPR SO₂ Group 2 allowances under the CSAPR SO₂ Group 2 Trading Program. Such allowances are allocated, auctioned, recorded, held, transferred, or deducted only as whole allowances.

Allowance Management System account means an account in the Allowance Management System established by the Administrator for purposes of recording the allocation, auction, holding, transfer, or deduction of CSAPR SO₂ Group 2 allowances.

Allowance transfer deadline means, for a control period before 2021, midnight of March 1 immediately after such control period or, for a control period in 2021 or thereafter, midnight of June 1 immediately after such control period (or if such March 1 or June 1 is not a business day, midnight of the first business day thereafter) and is the deadline by which a CSAPR SO₂ Group 2 allowance transfer must be submitted for recordation in a CSAPR SO₂ Group 2 source's compliance account in order to be available for use in complying with the source's CSAPR SO₂ Group 2 emissions limitation for such control period in accordance with §§ 97.706 and 97.724.

Alternate designated representative means, for a CSAPR SO₂ Group 2 source and each CSAPR SO₂ Group 2 unit at the source, the natural person who is authorized by the owners and operators of the source and all such units at the source, in accordance with this subpart, to act on behalf of the designated representative in matters pertaining to the CSAPR SO₂ Group 2 Trading Program. If the CSAPR SO₂ Group 2 source is also subject to the Acid Rain Program, CSAPR NO_X Annual Trading Program, CSAPR NO_X Ozone Season Group 1 Trading Program, or CSAPR NO_X Ozone Season Group 2 Trading Program, then this natural person shall be the same natural person as the alternate designated representative as defined in the respective program.

Assurance account means an Allowance Management System account, established by the Administrator under § 97.725(b)(3) for certain owners and operators of a group of one or more CSAPR SO₂ Group 2 sources and units in a given State (and Indian country within the borders of such State), in which are held CSAPR SO₂ Group 2 allowances available for use for a control period in a given year in complying with the CSAPR SO₂ Group 2 assurance provisions in accordance with §§ 97.706 and 97.725.

Auction means, with regard to CSAPR SO₂ Group 2 allowances, the sale to any person by a State or permitting authority, in accordance with a SIP revision submitted by the State and approved by the Administrator under § 52.39(h) or (i) of this chapter, of such CSAPR SO₂ Group 2 allowances to be initially recorded in an Allowance Management System account.

Authorized account representative means, for a general account, the natural person who is authorized, in accordance with this subpart, to transfer and otherwise dispose of CSAPR SO₂ Group 2 allowances held in the general account and, for a CSAPR SO₂ Group 2 source's compliance account, the designated representative of the source.

Automated data acquisition and handling system or DAHS means the component of the continuous emission monitoring system, or other emissions monitoring system approved for use under this subpart, designed to interpret and convert individual output signals from pollutant concentration monitors, flow monitors, diluent gas monitors, and other component parts of the monitoring system to produce a continuous record of the measured parameters in the measurement units required by this subpart.

Biomass means -

Boiler means an enclosed fossil- or other-fuel-fired combustion device used to produce heat and to transfer heat to recirculating water, steam, or other medium.

Bottoming-cycle unit means a unit in which the energy input to the unit is first used to produce useful thermal energy, where at least some of the reject heat from the useful thermal energy application or process is then used for electricity production.

Business day means a day that does not fall on a weekend or a federal holiday.

Certifying official means a natural person who is:

Clean Air Act means the Clean Air Act, 42 U.S.C. 7401, et seq.

Coal means “coal” as defined in § 72.2 of this chapter.

Cogeneration system means an integrated group, at a source, of equipment (including a boiler, or combustion turbine, and a generator) designed to produce useful thermal energy for industrial, commercial, heating, or cooling purposes and electricity through the sequential use of energy.

Cogeneration unit means a stationary, fossil-fuel-fired boiler or stationary, fossil-fuel-fired combustion turbine that is a topping-cycle unit or a bottoming-cycle unit:

Combustion turbine means an enclosed device comprising:

Commence commercial operation means, with regard to a unit:

Common designated representative means, with regard to a control period in a given year, a designated representative where, as of April 1 immediately after the allowance transfer deadline for such a control period before 2021, or as of July 1 immediately after such deadline for such a control period in 2021 or thereafter, the same natural person is authorized under §§ 97.713(a) and 97.715(a) as the designated representative for a group of one or more CSAPR SO₂ Group 2 sources and units in a State (and Indian country within the borders of such State).

Common designated representative's assurance level means, with regard to a specific common designated representative and a State (and Indian country within the borders of such State) and control period in a given year for which the State assurance level is exceeded as described in § 97.706(c)(2)(iii), the amount (rounded to the nearest allowance) equal to the sum of the total amount of CSAPR SO₂ Group 2 allowances allocated for such control period to the group of one or more CSAPR SO₂ Group 2 units in such State (and such Indian country) having the common designated representative for such control period and the total amount of CSAPR SO₂ Group 2 allowances purchased by an owner or operator of such CSAPR SO₂ Group 2 units in an auction for such control period and submitted by the State or the permitting authority to the Administrator for recordation in the compliance accounts for such CSAPR SO₂ Group 2 units in accordance with the CSAPR SO₂ Group 2 allowance auction provisions in a SIP revision approved by the Administrator under § 52.39(h) or (i) of this chapter, multiplied by the sum of the State SO₂ Group 2 trading budget under § 97.710(a) and the State's variability limit under § 97.710(b) for such control period, and divided by such State SO₂ Group 2 trading budget.

Common designated representative's share means, with regard to a specific common designated representative for a control period in a given year and a total amount of SO₂ emissions from all CSAPR SO₂ Group 2 units in a State (and Indian country within the borders of such State) during such control period, the total tonnage of SO₂ emissions during such control period from the group of one or more CSAPR SO₂ Group 2 units in such State (and such Indian country) having the common designated representative for such control period.

Common stack means a single flue through which emissions from 2 or more units are exhausted.

Compliance account means an Allowance Management System account, established by the Administrator for a CSAPR SO₂ Group 2 source under this subpart, in which any CSAPR SO₂ Group 2 allowance allocations to the CSAPR SO₂ Group 2 units at the source are recorded and in which are held any CSAPR SO₂ Group 2 allowances available for use for a control period in a given year in complying with the source's CSAPR SO₂ Group 2 emissions limitation in accordance with §§ 97.706 and 97.724.

Continuous emission monitoring system or CEMS means the equipment required under this subpart to sample, analyze, measure, and provide, by means of readings recorded at least once every 15 minutes and using an automated data acquisition and handling system (DAHS), a permanent record of SO₂ emissions, stack gas volumetric flow rate, stack gas moisture content, and O₂ or CO₂ concentration (as applicable), in a manner consistent with part 75 of this chapter and §§ 97.730 through 97.735. The following systems are the principal types of continuous emission monitoring systems:

Control period means the period starting January 1 of a calendar year, except as provided in § 97.706(c)(3), and ending on December 31 of the same year, inclusive.

CSAPR NO_XAnnual Trading Program means a multi-state NO_X air pollution control and emission reduction program established in accordance with subpart AAAAA of this part and § 52.38(a) of this chapter (including such a program that is revised in a SIP revision approved by the Administrator under § 52.38(a)(3) or (4) of this chapter or that is established in a SIP revision approved by the Administrator under § 52.38(a)(5) of this chapter), as a means of mitigating interstate transport of fine particulates and NO_X.

CSAPR NO_XOzone Season Group 1 Trading Program means a multi-state NO_X air pollution control and emission reduction program established in accordance with subpart BBBBB of this part and § 52.38(b)(1), (b)(2)(i) and (ii), and (b)(3) through (5) and (13) through (15) of this chapter (including such a program that is revised in a SIP revision approved by the Administrator under § 52.38(b)(3) or (4) of this chapter or that is established in a SIP revision approved by the Administrator under § 52.38(b)(5) of this chapter), as a means of mitigating interstate transport of ozone and NO_X.

CSAPR NO_XOzone Season Group 2 Trading Program means a multi-state NO_X air pollution control and emission reduction program established in accordance with subpart EEEEE of this part and § 52.38(b)(1), (b)(2)(iii) and (iv), and (b)(7) through (9), (13), (14), and (16) of this chapter (including such a program that is revised in a SIP revision approved by the Administrator under § 52.38(b)(7) or (8) of this chapter or that is established in a SIP revision approved by the Administrator under § 52.38(b)(9) of this chapter), as a means of mitigating interstate transport of ozone and NO_X.

CSAPR SO₂Group 2 allowance means a limited authorization issued and allocated or auctioned by the Administrator under this subpart, or by a State or permitting authority under a SIP revision approved by the Administrator under § 52.39(g), (h), or (i) of this chapter, to emit one ton of SO₂ during a control period of the specified calendar year for which the authorization is allocated or auctioned or of any calendar year thereafter under the CSAPR SO₂ Group 2 Trading Program.

CSAPR SO₂Group 2 allowance deduction or deduct CSAPR SO₂Group 2 allowances means the permanent withdrawal of CSAPR SO₂ Group 2 allowances by the Administrator from a compliance account (e.g., in order to account for compliance with the CSAPR SO₂ Group 2 emissions limitation) or from an assurance account (e.g., in order to account for compliance with the assurance provisions under §§ 97.706 and 97.725).

CSAPR SO₂Group 2 allowances held or hold CSAPR SO₂Group 2 allowances means the CSAPR SO₂ Group 2 allowances treated as included in an Allowance Management System account as of a specified point in time because at that time they:

CSAPR SO₂Group 2 emissions limitation means, for a CSAPR SO₂ Group 2 source, the tonnage of SO₂ emissions authorized in a control period by the CSAPR SO₂ Group 2 allowances available for deduction for the source under § 97.724(a) for such control period.

CSAPR SO₂Group 2 source means a source that includes one or more CSAPR SO₂ Group 2 units.

CSAPR SO₂Group 2 Trading Program means a multi-state SO₂ air pollution control and emission reduction program established in accordance with this subpart and § 52.39(a), (c), (g) through (k), and (m) of this chapter (including such a program that is revised in a SIP revision approved by the Administrator under § 52.39(g) or (h) of this chapter or that is established in a SIP revision approved by the Administrator under § 52.39(i) of this chapter), as a means of mitigating interstate transport of fine particulates and SO₂.

CSAPR SO₂Group 2 unit means a unit that is subject to the CSAPR SO₂ Group 2 Trading Program under § 97.704.

Designated representative means, for a CSAPR SO₂ Group 2 source and each CSAPR SO₂ Group 2 unit at the source, the natural person who is authorized by the owners and operators of the source and all such units at the source, in accordance with this subpart, to represent and legally bind each owner and operator in matters pertaining to the CSAPR SO₂ Group 2 Trading Program. If the CSAPR SO₂ Group 2 source is also subject to the Acid Rain Program, CSAPR NO_X Annual Trading Program, CSAPR NO_X Ozone Season Group 1 Trading Program, or CSAPR NO_X Ozone Season Group 2 Trading Program, then this natural person shall be the same natural person as the designated representative as defined in the respective program.

Emissions means air pollutants exhausted from a unit or source into the atmosphere, as measured, recorded, and reported to the Administrator by the designated representative, and as modified by the Administrator:

Excess emissions means any ton of emissions from the CSAPR SO₂ Group 2 units at a CSAPR SO₂ Group 2 source during a control period in a given year that exceeds the CSAPR SO₂ Group 2 emissions limitation for the source for such control period.

Fossil fuel means -

Fossil-fuel-fired means, with regard to a unit, combusting any amount of fossil fuel in 2005 or any calendar year thereafter.

General account means an Allowance Management System account, established under this subpart, that is not a compliance account or an assurance account.

Generator means a device that produces electricity.

Heat input means, for a unit for a specified period of unit operating time, the product (in mmBtu) of the gross calorific value of the fuel (in mmBtu/lb) fed into the unit multiplied by the fuel feed rate (in lb of fuel/time) and unit operating time, as measured, recorded, and reported to the Administrator by the designated representative and as modified by the Administrator in accordance with this subpart and excluding the heat derived from preheated combustion air, recirculated flue gases, or exhaust.

Heat input rate means, for a unit, the quotient (in mmBtu/hr) of the amount of heat input for a specified period of unit operating time (in mmBtu) divided by unit operating time (in hr) or, for a unit and a specific fuel, the amount of heat input attributed to the fuel (in mmBtu) divided by the unit operating time (in hr) during which the unit combusts the fuel.

Indian country means “Indian country” as defined in 18 U.S.C. 1151.

Life-of-the-unit, firm power contractual arrangement means a unit participation power sales agreement under which a utility or industrial customer reserves, or is entitled to receive, a specified amount or percentage of nameplate capacity and associated energy generated by any specified unit and pays its proportional amount of such unit's total costs, pursuant to a contract:

Maximum design heat input rate means, for a unit, the maximum amount of fuel per hour (in Btu/hr) that the unit is capable of combusting on a steady state basis as of the initial installation of the unit as specified by the manufacturer of the unit.

Monitoring system means any monitoring system that meets the requirements of this subpart, including a continuous emission monitoring system, an alternative monitoring system, or an excepted monitoring system under part 75 of this chapter.

Nameplate capacity means, starting from the initial installation of a generator, the maximum electrical generating output (in MWe, rounded to the nearest tenth) that the generator is capable of producing on a steady state basis and during continuous operation (when not restricted by seasonal or other deratings) as of such installation as specified by the manufacturer of the generator or, starting from the completion of any subsequent physical change in the generator resulting in an increase in the maximum electrical generating output that the generator is capable of producing on a steady state basis and during continuous operation (when not restricted by seasonal or other deratings), such increased maximum amount (in MWe, rounded to the nearest tenth) as of such completion as specified by the person conducting the physical change.

Natural gas means “natural gas” as defined in § 72.2 of this chapter.

Newly affected CSAPR SO₂Group 2 unit means a unit that was not a CSAPR SO₂ Group 2 unit when it began operating but that thereafter becomes a CSAPR SO₂ Group 2 unit.

Nitrogen oxides means all oxides of nitrogen except nitrous oxide (N₂O), reported on an equivalent molecular weight basis as nitrogen dioxide (NO₂).

Operate or operation means, with regard to a unit, to combust fuel.

Operator means, for a CSAPR SO₂ Group 2 source or a CSAPR SO₂ Group 2 unit at a source respectively, any person who operates, controls, or supervises a CSAPR SO₂ Group 2 unit at the source or the CSAPR SO₂ Group 2 unit and shall include, but not be limited to, any holding company, utility system, or plant manager of such source or unit.

Owner means, for a CSAPR SO₂ Group 2 source or a CSAPR SO₂ Group 2 unit at a source respectively, any of the following persons:

Permanently retired means, with regard to a unit, a unit that is unavailable for service and that the unit's owners and operators do not expect to return to service in the future.

Permitting authority means “permitting authority” as defined in §§ 70.2 and 71.2 of this chapter.

Potential electrical output capacity means, for a unit (in MWh/yr), 33 percent of the unit's maximum design heat input rate (in Btu/hr), divided by 3,413 Btu/kWh, divided by 1,000 kWh/MWh, and multiplied by 8,760 hr/yr.

Receive or receipt of means, when referring to the Administrator, to come into possession of a document, information, or correspondence (whether sent in hard copy or by authorized electronic transmission), as indicated in an official log, or by a notation made on the document, information, or correspondence, by the Administrator in the regular course of business.

Recordation, record, or recorded means, with regard to CSAPR SO₂ Group 2 allowances, the moving of CSAPR SO₂ Group 2 allowances by the Administrator into, out of, or between Allowance Management System accounts, for purposes of allocation, auction, transfer, or deduction.

Reference method means any direct test method of sampling and analyzing for an air pollutant as specified in § 75.22 of this chapter.

Replacement, replace, or replaced means, with regard to a unit, the demolishing of a unit, or the permanent retirement and permanent disabling of a unit, and the construction of another unit (the replacement unit) to be used instead of the demolished or retired unit (the replaced unit).

Sequential use of energy means:

Serial number means, for a CSAPR SO₂ Group 2 allowance, the unique identification number assigned to each CSAPR SO₂ Group 2 allowance by the Administrator.

Solid waste incineration unit means a stationary, fossil-fuel-fired boiler or stationary, fossil-fuel-fired combustion turbine that is a “solid waste incineration unit” as defined in section 129(g)(1) of the Clean Air Act.

Source means all buildings, structures, or installations located in one or more contiguous or adjacent properties under common control of the same person or persons. This definition does not change or otherwise affect the definition of “major source”, “stationary source”, or “source” as set forth and implemented in a title V operating permit program or any other program under the Clean Air Act.

State means one of the States that is subject to the CSAPR SO₂ Group 2 Trading Program pursuant to § 52.39(a), (c), (g) through (k), and (m) of this chapter.

Submit or serve means to send or transmit a document, information, or correspondence to the person specified in accordance with the applicable regulation:

Topping-cycle unit means a unit in which the energy input to the unit is first used to produce useful power, including electricity, where at least some of the reject heat from the electricity production is then used to provide useful thermal energy.

Total energy input means, for a unit, total energy of all forms supplied to the unit, excluding energy produced by the unit. Each form of energy supplied shall be measured by the lower heating value of that form of energy calculated as follows:

LHV = HHV − 10.55(W + 9H)

Total energy output means, for a unit, the sum of useful power and useful thermal energy produced by the unit.

Unit means a stationary, fossil-fuel-fired boiler, stationary, fossil-fuel-fired combustion turbine, or other stationary, fossil-fuel-fired combustion device. A unit that undergoes a physical change or is moved to a different location or source shall continue to be treated as the same unit. A unit (the replaced unit) that is replaced by another unit (the replacement unit) at the same or a different source shall continue to be treated as the same unit, and the replacement unit shall be treated as a separate unit.

Unit operating day means, with regard to a unit, a calendar day in which the unit combusts any fuel.

Unit operating hour or hour of unit operation means, with regard to a unit, an hour in which the unit combusts any fuel.

Useful power means, with regard to a unit, electricity or mechanical energy that the unit makes available for use, excluding any such energy used in the power production process (which process includes, but is not limited to, any on-site processing or treatment of fuel combusted at the unit and any on-site emission controls).

Useful thermal energy means thermal energy that is:

Utility power distribution system means the portion of an electricity grid owned or operated by a utility and dedicated to delivering electricity to customers.